JPS57125925A - Optical amplifying element - Google Patents

Optical amplifying element

Info

Publication number
JPS57125925A
JPS57125925A JP1088081A JP1088081A JPS57125925A JP S57125925 A JPS57125925 A JP S57125925A JP 1088081 A JP1088081 A JP 1088081A JP 1088081 A JP1088081 A JP 1088081A JP S57125925 A JPS57125925 A JP S57125925A
Authority
JP
Japan
Prior art keywords
light
liquid crystal
signal light
mirror
detector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1088081A
Other languages
Japanese (ja)
Inventor
Masao Kawachi
Yasuji Omori
Takao Edahiro
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP1088081A priority Critical patent/JPS57125925A/en
Publication of JPS57125925A publication Critical patent/JPS57125925A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
    • H01S3/1065—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using liquid crystals

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Lasers (AREA)

Abstract

PURPOSE:To amplify signal light at a low pumping light level without application of any bias magnetic field or the like and to make a titled element adaptable to an optical information processing field, etc., such as photoswitches by providing the inside wall surfaces of a cell giving distortions of bending to the molecular orientation of the liquid crystal sealed therein. CONSTITUTION:A spacer 1 is placed between ''Pyrex '' glass plates 2a and 2b, and a nematic liquid crystal 3 is sealed therebetween. Vertical orientation is applied on the inside surface 4a of the plate 2a and parallel orientation on the inside surface 4b of the plate 2b, and bending distortions are given to the liquid crystal molecules 3. An argon laser (about 3W output) 7' is separated with a beam splitter 8 to weak signal light 5 and strong pumping light 6, and the signal light 5 is made incident to the liquid crystal cell via an optical chopper 9 and a mirror 13, and the pumping light 6 is made incient to the cell via a mirror 10, an attenuator 11 and a mirror 12. A detector 15 detects the light 5, and a detector 14 the light 5. The signal light 5 is synchronously amplified through a lock-in amplifier 16.
JP1088081A 1981-01-29 1981-01-29 Optical amplifying element Pending JPS57125925A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1088081A JPS57125925A (en) 1981-01-29 1981-01-29 Optical amplifying element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1088081A JPS57125925A (en) 1981-01-29 1981-01-29 Optical amplifying element

Publications (1)

Publication Number Publication Date
JPS57125925A true JPS57125925A (en) 1982-08-05

Family

ID=11762633

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1088081A Pending JPS57125925A (en) 1981-01-29 1981-01-29 Optical amplifying element

Country Status (1)

Country Link
JP (1) JPS57125925A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01259330A (en) * 1988-04-11 1989-10-17 Hamamatsu Photonics Kk Full optical image amplifier
US4880296A (en) * 1987-06-04 1989-11-14 The United States Of America As Represented By The Secretary Of The Navy Opto-optical bean deflector, modulator, and shaper
US6826318B2 (en) 2001-10-12 2004-11-30 Fujitsu Limited Variable polarization plane rotator and optical device using same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4880296A (en) * 1987-06-04 1989-11-14 The United States Of America As Represented By The Secretary Of The Navy Opto-optical bean deflector, modulator, and shaper
JPH01259330A (en) * 1988-04-11 1989-10-17 Hamamatsu Photonics Kk Full optical image amplifier
US6826318B2 (en) 2001-10-12 2004-11-30 Fujitsu Limited Variable polarization plane rotator and optical device using same
US6931165B2 (en) 2001-10-12 2005-08-16 Fujitsu Limited Variable polarization plane rotator and optical device using same

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